WTB:
Wanting to upgrade my sons computer a bit. Hes only 4 so all he needs is a smooth running minecraft for the time being. Currently has an Athlon X2 64 4600, 2gb ddr2 667mhz and a Radeon 6450. I'd be looking for a Athlon X2 64 5800ish cpu, a video card up to a 5770/6770 or the nvidia counterpart. Also want to find him as much ram as possible so 4x2gb of DDR2 800mhz.

I've seen several 5600 and 5800s on ebay for $20-35 but they're mostly in Asia but I'd prefer to buy something a little closer to home. I see theres all sorts of different cpus compatible with this board on the page so I'm not sure what is the best and easy enough to find. I'm open to suggestions of course. Not really looking to spend a fortune on this either.

Cool. Thanks for the advice.
He only has 2gb in there now, it was 4gb but 2gb failed sometime while it was sitting in the basement collecting dust.
I'd be happy if he had 4gb in there again.
A 6850 would be overkilll for his needs. I think a 6770 or something similar would be best and also not require upgrading the psu.
It actually runs minecraft fine at lower settings with his system oc'd to 3.0ghz.
I'm hoping to be able to upgrade atleast 2 out of 3 of the parts I'm asking for. If I can do that then I think his system will run just fine until he gets my wifes q8200 as a hand me down when I upgrade hers.

I'm only looking to spend $50-60 in total to upgrade this as he'll get my wifes q8200 system in a few months when I upgrade hers. Her new system will most likely end up being something from AMD though.